What is the most accurate method to determine a 5-year-old child's skeletal age?

• A. X-ray of the pelvis
• B. Radiographs of the hand and wrist
• C. MRI of the brain
• D. Ultrasound of the abdomen

Answer: (B)

Assessing skeletal maturity relies on how bones in the hand and wrist develop. The left hand and wrist provide a wide range of ossification centers that change in a well-defined sequence as a child grows, making them the most reliable window into overall skeletal age. By taking an X-ray of the left hand and wrist and comparing the appearance of the bones to standard reference charts (such as the Greulich and Pyle atlas or the Tanner-Whitehouse scoring system), clinicians estimate the child’s bone age. This method is far more informative for skeletal maturity than imaging of other areas like the pelvis, brain, or abdomen, which do not reflect overall maturity in the same way.